Kristi Noem Sent Troops to Border, but Not to Flood Victims in South Dakota

President-elect Donald J. Trump picked the South Dakota governor to head the Homeland Security Department, which includes the Federal Emergency Management Agency.

John Thune Takes Charge in the Senate, Ushering in a New Leadership Era

The affable traditional conservative from South Dakota is the first new chief of the Senate G.O.P. in nearly two decades. He will confront a challenge managing President-elect Donald J. Trump’s expectations.